24
Circulator antiblocking:
The circulator acti-
vates every 24 hours of stop for 30 seconds.
1.10
Switching off for lengthy
periods
If the boiler is not used for a long period, car-
ry out the following operations:
−
position the mode selector on (5) to
" " (off-reset)
1
2
3
4
5
6
−
set the system's main switch to "off",
−
turn off the fuel and water taps of the
heating and domestic hot water sys-
tem,
9
In this case, the anti-freeze and an-
ti-blocking systems are deactivated.
Drain the heating and domestic water
system if there is any risk of freezing.
9
The Technical Assistance Centre
r
is available if the procedure reported
above is difficult to do.
1.11
Display and fault codes
When there is an operating fault a blinking
code is shown on the display and the red led
comes on in the event of a definitive lockout.
For a description of the faults, refer to the ta-
ble below.
CODE
DESCRIPTION
STATUS
AL10
Number of ignition at-
tempts exceeded (flame
absent/condensation
present lockout)
LOCKOUT
AL20
Limit thermostat fault
LOCKOUT
AL21
Low temperature
thermostat/
condensation pump
safety lockout
LOCKOUT
AL26
Return line
overtemperature
LOCKOUT
AL28
Return line/outlet probe
differential fault
LOCKOUT
AL29
Flue gases probe
overtemperature
LOCKOUT
AL34
Tacko fan fault - Air
pressure switch fault
LOCKOUT
AL40
System water pressure
low (after 10 minutes)
LOCKOUT
AL41
System water pressure
low
STOP
AL52
General electronic fault LOCKOUT
AL55
Fault due to absence
of boiler lockout
configuration
(corresponding jumper
absent)
LOCKOUT
AL60
DHW probe fault
SEE DEDI-
CATED SEC
-
TION
AL71
Outlet probe fault (open/
short circuit)
STOP
AL73
Return line probe fault
(open/short circuit)
STOP
AL79
Outlet overtemperature/
return line/outlet/return
probe lockout differen
-
tial fault
LOCKOUT
